update

springboot-main/pom.xml

@@ -31,6 +31,12 @@
             <artifactId>commons-io</artifactId>
             <version>2.6</version>
         </dependency>
+
+        <dependency>
+            <groupId>com.auth0</groupId>
+            <artifactId>java-jwt</artifactId>
+            <version>3.2.0</version>
+        </dependency>
     </dependencies>
 
 </project>

springboot-main/src/main/java/com/alvin/util/JsonUtil.java

@@ -10,6 +10,11 @@ import java.util.Map;
 
 /**
  * json工具类
+ * <dependency>
+ * <groupId>com.google.code.gson</groupId>
+ * <artifactId>gson</artifactId>
+ * <version>2.9.0</version>
+ * </dependency>
  * <p>
  * JsonUtil.getObject(str,JsonHello.class)
  *

springboot-main/src/main/java/com/alvin/util/JwtUtil.java

@@ -0,0 +1,101 @@
+package com.alvin.util;
+
+import com.auth0.jwt.JWT;
+import com.auth0.jwt.JWTCreator;
+import com.auth0.jwt.algorithms.Algorithm;
+import com.auth0.jwt.interfaces.Claim;
+import com.auth0.jwt.interfaces.DecodedJWT;
+import org.springframework.util.Assert;
+
+import java.io.UnsupportedEncodingException;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * jwt工具类
+ * <dependency>
+ * <groupId>com.auth0</groupId>
+ * <artifactId>java-jwt</artifactId>
+ * <version>3.2.0</version>
+ * </dependency>
+ *
+ * @author mlamp
+ * @date 2022/05/22
+ */
+public class JwtUtil {
+    private static String SECRET = "123SDFEEdfdeFDRE";
+
+    /**
+     * 过期时间1000 60 秒 60 分钟 24 小时 10 天
+     */
+    private static final Long EXPIRE_TIME = 1000 * 60 * 60 * 24 * 30L;
+
+    private static Algorithm algorithm;
+
+    static {
+        try {
+            algorithm = Algorithm.HMAC256(SECRET);
+        } catch (UnsupportedEncodingException e) {
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * 校验token是否正确,是否过期
+     *
+     * @param token 密钥
+     * @return 是否正确
+     */
+    public static Boolean verify(String token) {
+        try {
+            JWT.require(algorithm).build().verify(token);
+            return true;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    /**
+     * 生成签名
+     *
+     * @param map 信息
+     * @return 加密的token
+     */
+    public static String sign(HashMap<String, String> map) {
+        Date date = new Date(System.currentTimeMillis() + EXPIRE_TIME);
+        JWTCreator.Builder builder = JWT.create();
+        for (Map.Entry<String, String> entry : map.entrySet()) {
+            builder.withClaim(entry.getKey(), entry.getValue());
+        }
+        return builder.withExpiresAt(date).sign(algorithm);
+    }
+
+    /**
+     * 获得token中的信息
+     *
+     * @return ShiroUserBean
+     */
+    public static HashMap<String, String> unSign(String token) {
+        Assert.isTrue(verify(token), "token验证失败");
+        HashMap<String, String> map = new HashMap<>();
+        DecodedJWT jwt = JWT.decode(token);
+        for (Map.Entry<String, Claim> entry : jwt.getClaims().entrySet()) {
+            String value = entry.getValue().asString();
+            if (value != null) {
+                map.put(entry.getKey(), value);
+            }
+        }
+        return map;
+    }
+
+    public static void main(String[] args) {
+        HashMap<String, String> map = new HashMap<>();
+        map.put("name", "小明");
+        String token = sign(new HashMap<String, String>() {{
+            put("name", "小明");
+            put("age", "18");
+        }});
+        System.out.println(unSign(token));
+    }
+}

test1/src/main/java/tmp.java

@@ -2,7 +2,9 @@ import java.nio.file.Files;
 import java.util.BitSet;
 
 public class tmp {
-    public static void main(String[] args) {
-
+    public static void main(String[] args) throws InterruptedException {
+        while (true) {
+            Math.pow(3, 1000);
+        }
     }
 }